Multi-coil system for inductive charging of portable devices at different power levels
US11411433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2021 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Dec 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2300/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for power inductively to a portable device is disclosed. In accordance with an embodiment the system includes a first primary coil that provides power inductively at a first power level and a second primary coil that provides power inductively at a second power level different from the first power level. The first primary coil and the second coil area are different in size and overlap one another partially. The system further includes a communication and control circuit that receives current modulated information in the primary coil that provides power. The received information includes information corresponding to a voltage or current induced by the primary coil that provides power, a unique identification code, and a manufacturer code. The system selects which primary coil to use to charge the portable device based on the received information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.